GRAIL Mission Design Timeline - SPACEFLIGHT101Both GRAIL Spacecraft will launch side by side on the same launch vehicle. The Delta II vehicle has to launch within GRAIL’s launch window that extends from September 8 to October 19, 2011 to allow the mission to take place as it was designed. When the spacecraft have been inserted into their desired trajectories, they will separate from the launcher. Shortly after spacecraft separations, the vehi
